Android 6.0权限申请与DialogFragment的show()结合所遇到的

• 开发那些事 • 4 条评论

最近在开发项目时需要用到Android 6.0权限申请，解决的快捷方式是用Google提供的EasyPermissions

于是在这个EasyPermissions中，onRequestPermissionsResult() 等同于onResume()的生命周期，在调用DialogFragment的show()方法时，就会报以下错误：

java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState 

经过一遍搜索，问题在于

onSaveInstanceState()方法是在该Activity即将被销毁前调用，来保存Activity数据的，如果在保存完状态后再给它添加Fragment就会出错

解决方法就是把commit() 方法替换成 commitAllowingStateLoss()

api中对commitAllowingStateLoss()给出的说法是：

Like commit() but allows the commit to be executed after an activity’s state is saved.

而对于DialogFragment的show()方法，源码是：

public void show(FragmentManager manager, String tag) {
    mDismissed = false;
    mShownByMe = true;
    FragmentTransaction ft = manager.beginTransaction();
    ft.add(this, tag);
    ft.commit();
}

因此，我写了个工具类的方法将commit（）方法替换成 commitAllowingStateLoss()
如下：

/**
 * 弹出语音对话框
 *
 * @param manager
 * @param dialog
 */
public static void showDialog(FragmentManager manager, VoiceDialog dialog) {
    FragmentTransaction ft = manager.beginTransaction();
    ft.add(dialog, "voice_dialog");
    ft.commitAllowingStateLoss();
}

当然，出现该异常可能还有其他原因，这是我所遇到的

4 条评论

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  1. 匿名

    说的好我儿

  2. Sonia

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  3. 匿名

    哈哈来瞎逛，终于有更新

  4. 匿名

    可以，加油